新闻中心
PET (polyethylene terephthalate) plastic film has low surface energy and high crystallinity, and is widely recognized as a difficult to stick material. Ordinary EVAhot melt adhesive pelletsThe problem of initially sticking PET but suddenly decreasing peel strength after cooling is often encountered, and the fundamental reason is that the adhesive cannot effectively infiltrate the surface of PET.
The key to making the hot melt adhesive particles stick firmly to the PET film is not about “how thick to apply”, but about “choosing the right model”. There is a modified formula specifically developed for low surface energy materials in Sunlife hot melt adhesive granules, which enhances the affinity for PET surface by introducing polar groups. After cooling, the peel strength can reach over 3N/cm.
The technical team of Guangzhou Sunlife Trading can recommend corresponding models based on customers’ specific PET film types (transparent/aluminum plated/printed surface).
Q: How long does it take for the hot melt adhesive particles to peel off after sticking PET?
A: Ordinary rubber particles usually have edge warping within 24-48 hours; After selecting the right modified formula, it can maintain adhesion for a long time without detachment at room temperature.
Q: Can we compensate for the weak adhesion by increasing the amount of glue applied?
A: Not recommended. Excessive thickness of the adhesive layer can increase internal stress and accelerate delamination. The correct approach is to change the formula rather than the amount of adhesive stacked.
Q: Is aluminum coated PET film harder to stick than transparent PET?
A: Yes, it is. The aluminum plating layer blocks the penetration of the adhesive solution, so it is necessary to choose modified adhesive particles with stronger permeability or apply a primer treatment on the aluminum plating surface.
< p > on < a href = "http://www.sunlife888.com" > < strong > hot melt adhesive books < / strong > < / a > how to use, through the following questions can help you go less detours: < / p > What application device is used? Binding equipment is usually installed and in use, […]
With the development of the plastic industry and the continuous emergence of new requirements in the market, companies that have been using specific granulation systems for a long time need to consider not only cost but also comprehensive understanding of application needs to choose the appropriate granulation system when increasing production capacity. The three main […]
Why is it harder to bond aluminum foil coated paper than regular paper? Aluminum foil coated paper has a layer of metal film on its surface, which is dense, smooth, and has low surface energy,Hot melt adhesive granulesIt is difficult to wet after coating, and the initial adhesion is much lower than that of copperplate […]
Functionality and effectiveness What should be considered when choosing environmentally friendly adhesives? Even at home. For example, if you want to repair a cup, you may use adhesive (a type of contact adhesive), but you will use it in your child’s art project; PVA glue, perhaps using double-sided (pressure-sensitive) tape in the scrapbook. For packaging, […]
